期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 39, 页码 19058-19065出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta07477a
关键词
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资金
- National Nature Science Foundation [51672220]
- 111 Program of MOE [B08040]
- National Defense Science Foundation [32102060303]
- Xi'an Science and Technology Foundation [2017086CGRC049-XBGY005]
- Shaanxi Provincial Science Foundation [2017KW-018]
- NPU Gaofeng Project of China [17GH020824]
- Basic Research Project of Knowledge Innovation Program of Shenzhen City [JCYJ20160229165250876]
Flexible supercapacitors with high areal capacitance are a promising approach for wearable energy-storage technology due to the limitation of the surface area of the human body (about 2 m(2)). Meanwhile, a tolerance to deformation and mechanic damage is critical for wearable applications. However, it is still a challenge to achieve supercapacitors with outstanding electrochemical performance and wearability, simultaneously. To solve this problem, we report high-performance, flexible, and tailorable solid-state supercapacitors enabled by Co3O4@PPy nanorod bundle arrays immobilized on carbon fiber cloth (CFC). Furthermore, a solid-state asymmetric supercapacitor was assembled using a freestanding Co3O4@PPy electrode, a freestanding porous carbon electrode, and PVA gel electrolyte. Benefiting from a 3D structure and the synergetic contribution of the Co3O4 nanorods and electrically conductive PPy layer, the Co3O4@PPy electrode and our developed supercapacitor exhibit a high areal capacitance of 6.67 F cm(-2) at a current density of 2 mA cm(-2), and 2.47 F cm(-2) at 4 mA cm(-2), respectively, as well as excellent rate capability. More importantly, the solid-state supercapacitor can be tailored into several units and various shapes. Each unit retains its original electrochemical performance. This work provides a new route to wearable energy-storage technology.
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